Lunar Eclipse An eclipse of the moon is called a lunar eclipse. It occurs when the full moon passes behind the earth into the earths shadow within the shadow the moon is no longer directly lighted by the sun Moon p Sun Explanation Lunar Eclipses• Lunar Eclipse • An eclipse of the moon is called a lunar eclipse. It occurs when the full moon passes behind the earth into the earth’s shadow. Within the shadow the moon is no longer directly lighted by the sun. • Explanation Lunar Eclipses